Trip-valve.



A. W. FISCHER. TRIP VALV B. APPLIUATION FILED MAB-.14, 1907.

960,872. Patented June {7, 1910.

' a sums-sum 1.

A. W. FISCHER. TRIP VALVE.

APPLIOATIO'H IIL ED MAR. 14, 1907.

' 960,872. Patented June 7,1910."

3 SHEETS-SHEET 2.

A. W. FISCHER.

TRIP VALVE. APPLICATION Hum 1112.14, 1007.

Patented June 7. 1810.

3 SHEETS-SHEET 3- mm/ron iwrrlsssss;

- UMTED STATES PATENT OFFICE.

ADALIBERT w. mscnnn, orrnrnemanrma, rENNsYnvANm, vAssm Non-ro scnzurzm AN]; xonnmme COMPANY, or PENNSYLVANIA.

Tb all whom concern:

Be it known that I, ADALBERT W. FIsoHnR, a subject of the Emperor of Germany, re-

' trolled byit, and provided also with means with the means for rapidly closing the valve when necessary in case of emergency, and the object of my invention is 'to improve the emergency valve closing means and also to combine the emergency closing means in a simple manner for normally opening and closing the valve.

The various features of novelty which characterize my invention are pointed out with articularity in the claims annexed to and orming a part of this specification. For a better understanding of my invention, however, and. the advantages possessed by it, reference may be had to the accompanying drawings and descriptive matter, in which I haveillustrated and described one of the forms in'which my invention may be embodied.

Of the drawings, Figure 1 is a sectional elevation with :the valve in the'closed position Fig. 2 is an elevation taken at right angles to Fig. 1 of a portion of the valve operating mechanism. Fig. 3 is a view similar to Fig. 1 with the valve in the open position. Fig.4 is a view taken similarly to Fig. 1 showing a modified construction. Fig. 5 is an elevationtaken at right angles to Fi' 4.

Re erring first to the construction shown in Figs. 1 to 3 of the drawings, A represents thevalve casing having an inlet-passage or chamber A and an outlet passage or chamber A separated by the partition A -in which is formed the port A having on its upper side the valve seat A. The port A is controlled by a compound valve comprising the main valve B and pilot valve D. The main valve B has attached to it the piston- B which slides in the hollow cylinder OF PHIEADELIPHIA, PENNSYLVANIA, A (203.2ORA'JlIQN.

TRIP-VALVE.

Specification of Letters Patent. Applicatioii filed March 14, 1907. Serial No. 362,431.

Patented June '7, 1910.

b the head C the latter being secured in p ace by bolts and nuts C to close an opening Ain the valve casing through whlch'the valve may be removed;

B through the trolled by the pilot valve D which when of its seat as shown in Fig. 3, opens communication between the interiors C and hollow piston B ofthe valve B.

The pilot valve D is secured to the end of the valve stem E by a nut D surrounding. the stem above a flange E formed at its lower end, the nut screwing intoa threadedsocket D formed in the upper side of the valve D and receiving the end of the stem. The valve D forms a. means for connecting the-stem E to the main valve B, as the nut. D engages the lower end. of a hollow boss: B surrounding the stem E and'secured to: the valve B by bolts B to lift. the valve- B when the stem E is raised, and. the valve D bears against the seat B to hold the valve B firmly against its seat when; the valve 1s: closed.

The stem E has secured to its. valve closing piston E adapted to reciprocate in a. cylinder C carried by the head C A. stufling box C closes the lower end of the cylinder C Above the cylinder C 1s a head C provided with. a stuifing box C for theportion of the stem E passmg thro it.

The portion E of the valve stem a ve the head 0 is threaded, the threaded. or. tion passing through a nut F which 1s s id.-' ingly but nonrotatablly received in a. bushof the cylinder and the under side ing or cross head G supported from the shown in Fig. 3, a bearing block F being provided at the upper end of the recess to engage the detent. A spring actuated plun-' ger H is carried by the lever H which on- 5 gages the cross-head G and tends at all times to hold the detentH against the nut F. The lever H is connected by a rod I pivoted to it at I to a reduced extension I of the difl'erential piston I which slides in the cylinder C formed in the valve head C at one side of the cylinder C. The'upper end of the cylinder 0 is closed by the elongated head C which is formed at its ends with tight bearings for the piston extension 1.

The upper end of the cylinder C is in relatively open communication with the valve chamber A through ports G and G formed in the head 0 A port C leads from the upper end of the cylinder C to the upper end of the cylinder 0 The lower en of the cylinder C is connected to a pipe J by a passage C A relatively large branch passage O leads from the passa e 5 C to the lower end of the chamber The exhaust pipe J is controlled by a suitable valve J In the operative condition of the parts, the nut F isheld in the elevated position shown in Fig. 3 by the detent H and the valve may be slowly opened and closed by rotating the hand wheel K carried by the upper end of the stem E. When the valves B and D are both on their seats, the high pressure from the inlet chamber A passing into the interior of the hollow cylinder C and hollow piston B through the restricted leak port B and between the piston and the inner Wall of the cylinder C holds the valve B firmly against its seat. When'thereafter the stem E is moved in the opening direction and the .valve D lifted ofl its seat placing the interior of the cylinder C and hollow piston B in communication with the low 5, pressure chamber A of the valve casing, the valve B becomes practically balanced and may be easily moved into the open position shown in Fig. 3.

The pressure on the piston E is normally 5o balanced by leakage allowed to pass by the iston from the upper end of the cylinder 3 into the lower end, thus readily permitting the slow movement of the piston when the valveis opened and closed in the usual manner. The fluid thus leaking into the lower end of the chamber G acts upon'the lower and larger end of the differential lock controlling piston I and maintains the lever H in position in which the detent H enters the notch F and locks the nut in its elevated position.

When in case of emergency the valve J is turned to connect the pipe J to exhaust, the ressure is suddenl removed from be- 85 neat the lower ends 01 the pistons E and 1*, the piston I moves downward, unlocking thenut F, whereupon the fluid pressure in the upper end. of the cylinder C moves the piston E rapidly downward and forces the valves B and D against their seats, thus effectually closingthe port A*.

The position of the parts after the emergency closure of the valve in the manner just described, is shown by Fig. 1. To return the nut F- from the position shown in A Fig. 1, to that shown in Fig. 3, the handwheel K is rotated in the valve-closing direction; this rotation of the hand-wheel causes the nut'to travel up the threaded valve stem portion E since the valve itself so is then resting against its seat and hence incapable of further movement in the valveclosing direction. After the nut F has thus been returned to the position shown in Fig.

3, and the detent H has been moved into the recess F a subsequent rotation of the handwheel in the reverse, or valve-opening direction, opens the valve.

- As the port 0 is larger than the portion of the port C between the lower end of the port C and the cylinder 0 the piston I moves to release the look before the pressure on the piston E becomes greatly unbalanced though the entire closing action is quite rapid. o

It will of course be understood that the passages C and C are large enough so that any leakage past the pistons E and I will not aifect the rapid movements of the pistons when the valve J is opened. The valve J ma be operated by hand, or may be 'connecte up to any suitable automatic mechanism, in ways well known to those skilled in the art. The use of a single controlling device, such as the valve J for setting in operation the fluid actuating means for unlocking the nut F and for suddenly closing the. valves is very effective in obtalning a rapid closing of the port A whenever occaslon re uires. The lever H may of course be emp oyed to lock and unlock the nut F when necessary.

In the form of m "invention shown in Figs. 4 and 5, the aid pressure actuated means employed in the construction first de- 11. scribed to close the valve are replaced by resilient means which, when the valve ,is open, are at all times under compression, tending to close the valve when the lock lever H is tilted to release the valve opcrating stem. In the construction shown in Figs. 4 and 5 the nut F is provided at its upper end with a cross head F 3 from the opposite ends of which extend downwardly rods F which pass through apertures formed for the purpose in ears G projecting from the cross head G and carry at'their lower ends adjustable threaded nuts F. Between washers F supported by the nuts F and the under sides of the cross head ears G are p placed compression springs F,- which surround the portions of the rods F rojecting downward through the ears These springs F are under compression and tend at all times to move the valve from the open position toward the closed' osition. The upper end of the cylinder 7 is connected to the inlet side of the valve casing by a passageway G and the chamber ,C" below the dlfierential piston I, is'normally filled with fluid under the same pressure as that I in the inlet side of the valve casing by leakage past the piston I The passage Cf .leading from the lower end of the chamber C to the pipe J is not connected to a source of fluid under pressure, -as in the construction shown in Figs. 1 to 3. A restricted passageway C supplies fluid under pressure tothe chamber C. The operation of this form of iny invention is apparent. in

view of the foregoing.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is 1. In combination, a valve casing -having chambers separated bya port, a valve con trolling said port, a lock for positively holding said valve open, fluid pressure actuated means for closing said valve, including'a cyl1nder,'a plston moving 1n said cyllnder and means for normally supplying both ends of said cylinder with fluid under pressure, and a single controlling device for releasing said lock and unbalancing the pressure. on said piston to cause the latter to move and close the valve.

2. In combination -a valve casing having chambers se' arated by a port, a valve controlling sai in operative relation forms a means by which the'valve may be slowly moved into and out of the position to close its port, a lock nor mally holding said mechanism in its operative position and fluid pressure actuating means, including a ,common controlling device, for releasing said lock and rapidly closing said valve when said controlling device'is actuated.

3.-In combination a valve casing having chambers separated by a port, a valve conacscrew and nut valve optrolling said port crating means, a lock normally holding said means insuch relation to the valve that the latternmaybe slowly opened and closed by the operation of the screw and nut, fluid pressure mechanism, including a common controlling device, for releasing said lock and rap1 ly closing said valve when the controlling device is operated.

4. In combination, a valve casing having inlet and outlet chambers se arated b a port, avalve controlling said port, a eek for positively holding said valve open, fluid pressure actuated means 'for releasing said 100 c,

port, mechanism which when high and low pressure chambers separated fluid pressure actuated means for closing said valve and a single device for controlling the operation of both of said fluid pressure actuated means.

5. In combination a valve casing havin high and low pressure chambers separat by a port, a valve controlling the port, a stem. connected to said valve, a piston connected to the stem, a cylinder in which said iston' moves, a lock for holding said stem 1n the valve-open position, a piston for operating said look, a second cylinder in which the last mentioned piston moves, said cylinders having their ends from whichthe pistons move to unlock the stem and close the valve in relatively free communication with the high pressure chamber and their 0p 0- site ends 1n restricted communication with the highpressure chamber, and means for connecting said opposite ends of the cylinder to exhaust.-

6. In combination a valve casing having high' and low pressure chambers separated by a port, a valve controlling the port, a stem connected to said valve, a piston connected to the stem, a c linder in which said piston moves, a lock or holding said stem' in the valve open position, a piston for operating said look, a second cylinder in which the last mentioned piston moves, said cylinders having their ends from which the pistons move to unlock the stem andclose the valve in relatively free communication with the high pressure chamber and their opposite ends in restricted communication with the high pressure chamber and means for connecting said opposite ends to exhaust,

said means including a single actuating device.

7. In combination, a valve casing having by a port, a valve controlling said port, a

stem connected to said valve, a valve elosing piston connected to said stem, a cylinder in which said piston moves, a lock for holding said stem in the valve-openpositibn, adi e rential piston for operating said look, a cylinder in which said differential piston mdves, said cylinders being arranged so that end of said difi'erential piston being adjacent the end ofits inclosed cylinder, toward which the piston moves to' release the lock whereby the normally unbalanced pressure acting on'the opposite ends of the piston,

tion. T

8. In combination, a valvec'asing having inlet and outlet chambers separated bya port, a valvecontrollingthe port, a stem convtends to hold the lock in the locking posinected to said valve, a lock for holding said stem in the valve-open position, a valve closing. piston connected to said stem, a cylinder in which said piston moves, a lock releasing piston connected tothe lock, a cylinder receiving the lock releasing piston, the ends of said cylinders from which the pistons move torelease the lock and close the valve being in relatively free communication with asource of fluid pressure and the opposite ends of the cylinders' being in restricted communication with said source of fluid pressure, and means includin a single actuating device, for opening sai opposite ends of both ofsaid cylinders to exhaust.

9. In combination, a valve casing having high and low pressure chambers separated by a port, a valve controllin said port, a stem connected to said valve, a lock for holding said stein in the valve-o en position, provisions for closing said vave when the aces-m latter is unlocked, a difierential piston for operating said lock, a cylinder in whlch said d1flerent1al piston moves; means for freely admitting fluid under pressure to the end of said cylinder from which the piston moves. to unlock the valve and for admitting fluid under pressure in a restricted manner to the opposite end of the cylinder and means for connecting said opposite end of the cylinder to exhaust, the large area end of said differential iston being adjaeent the end of its cylin er toward which the iston moves to release the lock, Whereby the normally unbalanced pressure-acting on the opposite end of the piston tends to hold the lock in the locking position.

ADALBERT W. FISCHER.

A NOLD KA'rz, ERNEST H: Hones. 

